The main research of our project were as follows :(1) The experiment was carried out to examine the facilitative effect of word problem solving using the diagram support. As a result, fifth graders could easily solve each word problem when they integrated problem representation into their mathematical knowledge.(2) Fifth and sixth graders in the diagram-relational picture group and in the relational picture group outperformed fifth and sixth graders in the diagram group and the control group. The students in the diagram-relational picture group and in the relational picture group could easily understand the part-whole relation of ratio word problems by building their mental models.(3) When fifth graders studied ratio word problems using the computer-based tutoring software support which were developed by our research project, they solved some kinds of difficult word problems more than the other fifth graders who did not receive the software environment.4 割合文章題の下位過程の解決を支援するコンピュータ・ソフトを開発し、小学5年生にその教授効果を吟味した。その結果、コンピュータ・ソフトを利用することで、ある種の文章題の解決を促進することが示された。5 今回の研究で、情報統合の段階が問題解決にとって重要であること、及びその学習が問題解決の促進につながることが解明された。今後は、子どもが容易に情報を統合できる方略、例えば本研究の関係図学習のような方略、を開発することが必要であろう。また、そのような方略の教授が多様な問題の解決に有効であるのか(問題解決の転移)、あるいは問題解決だけでなく問題発見にまで結びつくのか、等を吟味することが必要である。